Thirds to



(No Model.)

D'E VOE.

CAMERA.

- No. 250,214. I Patented Nov. 29,1881.

:ja Mmz/ Z Sheets-Sheet 1.,

i 2 Sheets-Sheet 2. W. M. DE VOE.

(No Model.)

' CAMERA.

Patented Nov.l 29

rUNITED S'rnfriss hAfrnNT* OFFICE,

' wnsLnY M. DE Von, on "URBAN, oHIo, Assionon or Two-THIRDs "ro RLPH BUOHANAN AND A. H. -McFAnLAnn BoTH'oF SAME PLACE.

vCAMERA.

SPECIFIQATION forming' part 'of Letters Patent No. 25 O,214=,,dated November 2 97,'1881.

` I Application'filed July 12, 1881. (No model.)

.To all wiiom it maly concer'n Be it known that I, W. M. DE VUE, acitizen of the' United States, residing at Urbana, in

,l the county of Champa-ign and State of Ohio,

5 have invented certain newand nseful'Improvements in- Cameras; and Ido hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others shilled in the art to which it appertains io .to make and use the same, reference being had to the accompanying drawing's, and to the letviers or figures of reference marked thereon,

w which form a part of this specification.

i In the drawings, Figure 1 is a' perspective I 5 view of my iinprcved appnratus, showing lthe method of its sttachment to theinovahle front board of a camera andits position with reference toth'e iens-tnbe, said movahlefront heard .being` here shown as -detached from the camzo era.. Fign is a side elevation of the apparatus;

Fig. 3, a rear perspective "view, showing the hntters closed; Fig. i, a perspective view,

showing the shutters opened. Figo, 5, 6, 7,

and 8 are detail views of the several parts, and will he more fully deseribed hereinafter.

The object of my invention is to enablean operator to easily uncover or cover the lenstube, so as to admit or exclude light from the camera, while standing atanydesired distance from the camera, thus having full control over the exposure of the sensitized plate.

'llhe invention consists, first, in a camerashuttcr made in two parts, which are hingcd ror pivoted upon axes at right angles to the 3' 5 axis of the lens-tube, and capableof occupying a plane parallel to the real' or inner end of the lens-tube, and of being swuug renrwerd and apart, so as to nncovert-he lens-tube.

It furthcr consists in 'a camera-shutter'made 40 in two parts,providcd with pivotal bearing's or vhinges actuated by nvrod secured to said piv- 'Total hinges and an nir-chnmber.

It consists,i`urther, in acollapsible air-chamber actuating rods secured to the ends of said air-chamber and. the pivoted hinges secnred to the movable shntters,V

. .lt lastly consists in details of construction that will bo hereinafter more 'fully setforth in the specification and clnims and pointed cut '50 in 'the dra-wings; i

- vIn the application of myinvention-I attaeh to or upon the rear or inner side of the-front board,`H, of a. camera'a metal plate, r, which has the form shown in Figs. 1,-2,3, and 4, and' which is provided with a rearward-projecting ring or short tube, O, that surrounds the opening in said front board, through which passes the lens-tube L. o

Pivoted or hinged to or upon two cars whichproject laterally and rearward from the plate i', and atopposite sides thereof, are two arms ;Or hinges, 11, capable of swinging in a horizontal'planei'rom the position shown in Fig. 3 to that shown in Fig, 4.

1 To orl upon each arm or hinge p is secured a plate or shutter, A, which has the form of a half-circle, and,in =.onnection with the oppo-' site shooter, has such dimensions as to enable it to cover therear end of the ring or tube O and prevent the passage oflight through the lens L. i, A

In Figs. l and 2 the arms p are hinged in front o'fthe face of the ring C at a point between the plane of the attachment to the front board and the plane occupied by theshutterleaves A when closed, and can-se the latter, when opened,to be moved to the position shown in Fig'. 4,' the edge of each shutter being carried forward, so as to requircless spacein the rear of said ring within which to swing' than So would be necessary if, the pivot or hinge were upon a line with the rear face of said ring.

Securcd upon theplate r inidway between theupper ends of the arms or hinges p is a col-` lapsible airchamber, B, which is capable ot 8 5 being disteuded and collapsed, and when distendcd has the general form of anl ellipse, as shown in Figs. 4 and G, and when collapscd has the general form of a short cylinder, as shown in Figs. 1, 3, and 5. This ztir-chamber ,90 B is intended to distend and collapse lengthwiseonly, and in'ord'er that such will always bc the case its 'central longitudinnl portion is thickened ciroumferentially, or is 'preferably constructed of shcet metal or other suitable 95' substance, so as to bc able to resist the lteral pressure of the air. The ends d of soid airchamber are also thickened, and to each is attached one end of a rod` or wire, E, the opposite end of which extends toand is pivoted to zoo or upon the contiguous arm p, the length of the rod and the point of its attaehment to said arm being such as to cause the shutter-leaf A to be closed when said air-chamber is eollapsed and to open when said air-chamber is distended. The portion ot' air-chamber B shown at B' in Figs. 5 and 6 is made of sufticient thinness to allow it to collapse inwardly by the pressure of the air outside upon the withdrawal of the io air from the interior of said air-chamher. At

some point, preferably at the front central portion, the air-chamber Bl is provided with a nozzle, N, to which is attached oneend of a rubber tube, the opposite end of which is to be provided with an ordinary syringe-bulb, G, the arrangement being such as to enable an oper ator to distend said air-chamber B and open the shutters A, when desired, by givin'g bulb G snfficient pressure to force the eontaincd air zo into chamber B.

It is intended that the air-chamber B shall be eollapscd in its normal condition and automaticallyretnrn to such position when the bulb G is released from pressure; but, if desired, a

spring of coilcd. wire or rubber band, o, may be attached to the arms p and to collar c, as

shown at 1' t' in Figs. l and 2.

In order to equalize the pressure of the airchamber I- and cause the arms p and shutterleaves A to move in unison, the arms p are connected by a rod, a', attached to' projeetions on arms p on opposite sides of pivotlr, as shown in Figs. l and 2. The nozzle N of the airehamber B is iassed throu h a hole in the' 3 5 plate and securcd by a key, t, which passcs through opposite note'hes. y, in the nozzle N, thus holding the chamber Il iirmlyin position,

as shown in Figs. 7 and S. g

In order to eflectually exclude the lightfroni 40 the interior of the camera when the shutter is closed, the shutter-leaves A are bent at right angles, which bcnt portion is eurved, so as to presentopposin g coneave surfaces to each other .when closed. Each shutter-leaf is lined with velvet, which is drawn over this concave surface and secured on the back of this projection A'. In the space thus left under said velvet is placed a piece of rubber tubing, z, or other elastic substance, so as to cause the convex surface to press the Velvet on the opposite side into the concavity of the opposite edge, thus positivelyinsuring the cxclnson of light.

This apparatus can be applied to cameras having considerable difference in size, as but little space is required at the opposite sides or in the rear for the operation of parts. It can alsobe used with lenses of different size, as the apparatns works independently of the lenstube, said lens-tube being removable without affecting the working of-the shutter.

The operation of the apparatus is automatic and certain, the parts not being liable to become deranged so as to fail to exelude light from the camera. The operation is com pletel y 6 5 under the eontrolof the operator, who can from any suitable point open or close the shutter without the movement sing seen by the sitter and without deranging the focus. I

Having vthus described my invention, what I claim as new, and desire to secure by Ii'etters Patent, is-- 1. A eamera-shutter made in two parts, provided with pivotal bearings or'hinges, and actuated by a rod securcd to said hinges and to the extremities ofan air-chamber, substantially as setforth.

2. In acamera, a collapsibleair-chamber, and actuating rods securcd to the ends of said airchamber and to pivoted hinge's securcd to the movable shutters, substantially as described.

3. In a camera having a shutter made in two parts, the arms or hingesp, securcd to said shutter-leaves and pivoted to ears which project laterally and rearwardfrom the plate 1', and adapted to move in a horizontal plane when the shutter-leaves are moved to their opened position, substantially as shown and deseribed.

4. In a camera, aeollapsible air-chamber, B, securcd upon the plate r midway between the upper euds of the hinges p, to which the shutterleaves are securcd, substantially as set forth.

5. A camera provided with an air-eharnber,

B, having its central portion constructed of rubber or other suitable material-and thickened circumferentially, so as to resist the lateral pressure of the air, and adapted to disten d and collapse lengthwise of the air-chamber, as `shown and described.

6; A camera provided with'a collapsible airchamber, having its longitudinal central portion thickened eircumferentially, and its enfds d also thiekened, substantially as and for the purpose set ferth.

7. A camera provided with an air-ehamber, as dese1'ibed, 'to each end of which is securcd one end of a rod or wire, E, the opposite ends ot' which extend to and are pivot il to the contiguous armot' a hinge securcd to one leaf of rio the camera-shutter, snbstantia-lly as shown and described.

8. A camera having an air-chamber which distends and collapses in the direction of its length, and provided with rods al ached to r 15 each end of the air-bulb and to pivoted hinges securcd to the shutter-leaves, the length of said rods and the point of their attachmentto said pivoted hinges or arms being such as to cause the shutter-leaves to be closed when the chamx20 ber is collapsed and to open when the ehamber is distended, subs-tantiallyas shown and described.

9. A camera provided with an air-chamber having a rod securcd to each end thereof and to pivoted arms p, attached to 'the' shutterleaves, said arms being connected to a rod, ar, attached to projections to said arms on opposite sides of pivot 7:, whereby the arms p and shutter-leavesarecaused to move in unison, substantially as described. 10. A camera provided withanair-chamber,

IOS

. lB,l having nozzleLN, passin'g through a hole .in the plate r, and secnred by a key, fu, passing through opposit'e notches, y, in the nozzie,v .thereby holding the said chamber firmly in position, as set forth.

11. A camera provided with m'ovable shuttei'-leaves,'the inner edges. of which are bent and curved, so as vto present opposing concave surfaces'tol each other when closed, thns 'entirely excllid'ing the. light from the'interior of the camera whenvthe shutters are'closed, as'

12, -A'caip'era' provided with movable shuti ters; the inner edges of which are bent and curved, as decribed, said bent portions being ibent portions and'fastened to the lback of the projections, as and for the purpose set forth.

13. A eamera'providedwith movable shntf lto be pressed into the concavityof the oppo- Velvet,l as desflcribed, and having in the space lnnderneath said velvet avpiece of `ru-bber' tn1 ing or other elastio substance, z; so as to o anse the convex surface of the Velvet on one'edge 25 site edge, thus insnring the exclusion of light, snbstantially as set forth. I.

14; In a camera, the combination of a-caniera --tube,` a' cup-shaped air-Chamber, B, connecting-rodsx, plate r,'andair`-bu1b G, substani tially as oonstrncted, andsfor the pnrpose set forth.

In testimony whereof I aflix my signature .inmpresenoe of two witnesses. covered with Velvet, which is drawn over the 4 WESLEY M. DE VOEi Witnesses: 'i W. W. HELMICK, OzG. GLEssNER. 

